The North American Energy Standards Board (NAESB) is the non-profit, industry-consensus standards development organization formed in 1994 that writes the business practice standards for the North American wholesale and retail natural gas and electricity markets, organized into four quadrants — Wholesale Electric (WEQ), Retail Electric (REQ), Wholesale Gas (WGQ) and Retail Gas (RGQ). Headquartered in Houston, Texas, its home market is the United States (with Canadian and Mexican participation). NAESB sits upstream of every utility, ISO/RTO and energy-data platform in the value chain: it authors REQ.21 Energy Services Provider Interface (ESPI), the standard that is the basis of every Green Button implementation in North America, and it operates the NAESB Electric Industry Registry (EIR) that underpins electronic tagging across the wholesale electric market. Its API posture is deliberately split and must not be overstated. NAESB is not a data holder and no consumer-data mandate applies to it; the Green Button standard it publishes is adopted by US utilities purely voluntarily, with no federal obligation behind it. The specifications themselves are copyright-protected and paywalled — $8,000/year membership, $2,000 per quadrant version, or $250 per individual standard — with only a free, view-only, three-business-day evaluation waiver for non-members. The single genuinely open artifact is the set of ESPI XML schemas, released under Apache 2.0 as a documented one-time exception to the NAESB Copyright Policy and downloadable anonymously after a one-click terms-of-use acknowledgement. The one real API NAESB operates, the EIR webRegistry SOAP service administered by OATI, is closed: it requires a paid registry subscription and a digitally signed X.509 certificate issued by an NAESB-Authorized Certification Authority, and its endpoint could not even complete a TLS handshake anonymously. Open standard schemas, closed standards text, closed registry API, no consumer data and no open market data of its own.
NAESB publishes 2 APIs on the APIs.io network. Tagged areas include Energy, United States, Standards, Utilities, and Electricity.
NAESB’s developer surface includes documentation, tooling, pricing, support, authentication, changelog, and 23 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Energy & Utilities regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/naesb: open an issue to ask a question, or submit a pull request to add artifacts.
Submit an artifact on GitHub — free →Manage your own listing — the Influence plan, $499/mo →
The NAESB REQ.21 ESPI Model Business Practices define the data exchange protocol for transferring retail energy usage information from a utility (Data Custodian) to a Third Part...
The NAESB Electric Industry Registry is the central repository of registry information used by the North American wholesale electric industry for electronic tagging; it replaced...
aid: naesb
url: https://raw.githubusercontent.com/api-evangelist/naesb/refs/heads/main/apis.yml
name: NAESB
kind: company
description: 'The North American Energy Standards Board (NAESB) is the non-profit, industry-consensus standards development
organization formed in 1994 that writes the business practice standards for the North American wholesale and retail natural
gas and electricity markets, organized into four quadrants — Wholesale Electric (WEQ), Retail Electric (REQ), Wholesale
Gas (WGQ) and Retail Gas (RGQ). Headquartered in Houston, Texas, its home market is the United States (with Canadian and
Mexican participation). NAESB sits upstream of every utility, ISO/RTO and energy-data platform in the value chain: it authors
REQ.21 Energy Services Provider Interface (ESPI), the standard that is the basis of every Green Button implementation in
North America, and it operates the NAESB Electric Industry Registry (EIR) that underpins electronic tagging across the wholesale
electric market. Its API posture is deliberately split and must not be overstated. NAESB is not a data holder and no consumer-data
mandate applies to it; the Green Button standard it publishes is adopted by US utilities purely voluntarily, with no federal
obligation behind it. The specifications themselves are copyright-protected and paywalled — $8,000/year membership, $2,000
per quadrant version, or $250 per individual standard — with only a free, view-only, three-business-day evaluation waiver
for non-members. The single genuinely open artifact is the set of ESPI XML schemas, released under Apache 2.0 as a documented
one-time exception to the NAESB Copyright Policy and downloadable anonymously after a one-click terms-of-use acknowledgement.
The one real API NAESB operates, the EIR webRegistry SOAP service administered by OATI, is closed: it requires a paid registry
subscription and a digitally signed X.509 certificate issued by an NAESB-Authorized Certification Authority, and its endpoint
could not even complete a TLS handshake anonymously. Open standard schemas, closed standards text, closed registry API,
no consumer data and no open market data of its own.'
deliveryModel:
model: saas
open_source: false
commercial: true
callable_host: false
label: Hosted service · you call their endpoint
confidence: medium
source:
- pricing
generated: '2026-08-28'
method: derived
accessModel:
pricing: paid
onboarding: application-approval
trial: true
try_now: false
public: false
label: Paid membership or per-document purchase · Registry API requires accredited certificate
confidence: high
source:
- https://www.naesb.org/ESPI_Standards.asp
- https://www.naesb.org//misc/naesb_matl_order_espi_standards.pdf
- https://www.naesb.org//misc/NAESB_Nonmember_Evaluation.pdf
- https://www.naesb.org/pdf4/eir_webregistry_technical_guide_v6.1_1018.pdf
generated: '2026-07-27'
method: manual
image: https://www.naesb.org/images/naesb-logo.jpg
tags:
- Energy
- United States
- Standards
- Utilities
- Electricity
- Gas
- Green Button
- Smart Metering
- Energy Markets
- Grid
created: '2026-07-27'
modified: '2026-07-27'
specificationVersion: '0.23'
enrichment:
round: '2026-07-27'
note: 'Contract discovery upgraded this repo. The prior round recorded that the EIR webRegistry endpoint could not complete
a TLS handshake anonymously. That was a trust-chain failure, not a handshake failure: the server certificate is issued
by OATI''s private webCARES Server Issuing CA and does not chain to a public root. Once that is accounted for, the host
answers, the full 30-operation WSDL is served to anonymous callers, and the service returns a well-formed SOAP refusal
("Please present a valid certificate that is associated with a NAESB EIR user") rather than nothing at all. The WSDL is
now harvested verbatim and is this provider''s real machine-readable contract.'
apis:
- aid: naesb:naesb-espi-green-button
name: NAESB REQ.21 Energy Services Provider Interface (ESPI)
description: The NAESB REQ.21 ESPI Model Business Practices define the data exchange protocol for transferring retail energy
usage information from a utility (Data Custodian) to a Third Party with the Retail Customer's authorization. ESPI is the
industry-consensus standard that is the basis of every Green Button implementation in North America and is the standard
endorsed by the Green Button Alliance. NAESB publishes the standard; it does not operate an ESPI endpoint — each Data
Custodian utility hosts its own, so there is no NAESB base URL. The Atom/XML payload schemas (NAESBespiSchema.xsd and
retailcustomer.xsd, v3.3 and v4.0) are released under the Apache License 2.0 as a one-time exception to the NAESB Copyright
Policy and are harvested here verbatim. The narrative Model Business Practices themselves are copyright-protected and
must be purchased or obtained through NAESB membership. The v4.0 schema encodes an OAuth 2.0 authorization model directly
— ApplicationInformation carries authorizationServerAuthorizationEndpoint, authorizationServerTokenEndpoint, authorizationServerRegistrationEndpoint,
GrantType, TokenEndPointMethod, scope and OAuthError.
humanURL: https://www.naesb.org/ESPI_Standards.asp
tags:
- Green Button
- ESPI
- Energy Usage
- Smart Metering
- Authentication
- Retail Electric
tags_raw:
- Green Button
- ESPI
- Energy Usage
- Smart Metering
- OAuth
- Retail Electric
properties:
- type: XMLSchema
url: schemas/naesb-espi_v4.xsd
- type: XMLSchema
url: schemas/naesb-customer_v4.xsd
- type: XMLSchema
url: schemas/naesb-espi.xsd
- type: XMLSchema
url: schemas/naesb-customer.xsd
- type: Documentation
url: https://www.naesb.org/ESPI_Standards.asp
- type: Pricing
url: https://www.naesb.org//misc/naesb_matl_order_espi_standards.pdf
- type: TermsOfService
url: https://www.naesb.org/copyright.asp
- type: AgentSkill
name: Authorize and retrieve Green Button energy usage under NAESB ESPI
url: skills/naesb-espi-green-button-authorization.md
- aid: naesb:naesb-eir-webregistry
name: NAESB Electric Industry Registry (EIR) webRegistry Web Services
description: 'The NAESB Electric Industry Registry is the central repository of registry information used by the North American
wholesale electric industry for electronic tagging; it replaced the NERC TSIN in 2012 and is administered for NAESB by
Open Access Technology International (OATI) as OATI webRegistry. It exposes a documented SOAP 1.1 web service with methods
including DownloadEntity, DownloadBA, DownloadPSE and DownloadACA, described across the 121-page OATI webRegistry Technical
Guide v6.1. The service is HTTPS-only, and per section 2.5 of that guide no request is processed unless it carries a digitally
signed certificate associated with a registered webRegistry user; those certificates are issued by NAESB-Authorized Certification
Authorities. Access also requires a paid registry subscription. The full WSDL — one service, one portType and thirty Download*
operations over thirty entity structs — IS served to anonymous callers and is harvested here verbatim. Two things complicate
reaching it: the server certificate is issued by OATI''s private "webCARES Server Issuing CA 2025" and does not chain
to a public root, so default trust stores fail verification (curl exit 60); and once that is accounted for, an anonymous
SOAP call returns HTTP 200 with ReturnCode 1 / FAILURE and the message "Please present a valid certificate that is associated
with a NAESB EIR user". The contract is public; the data behind it is not.'
humanURL: https://www.naesb.org/weq/weq_eir.asp
baseURL: https://www.naesbwry.oati.com/cgi-bin/webplus.dll?Script=/naesbwry/WREG-Web-Services-Main.wml
tags:
- Registry
- Wholesale Electric
- SOAP
- E-Tagging
- Grid
properties:
- type: Documentation
url: https://www.naesb.org/weq/weq_eir.asp
- type: TechnicalGuide
url: https://www.naesb.org/pdf4/eir_webregistry_technical_guide_v6.1_1018.pdf
- type: APIReference
url: https://www.naesb.org/pdf4/eir_webregistry_technical_guide_v6.1_1018.pdf
- type: UserGuide
url: https://www.naesb.org/pdf4/eir_webregistry_user_guide_v5.0_1023.pdf
- type: GettingStarted
url: https://www.naesb.org/pdf4/eir_webregistry_quick_start_guide_v3.0_1023.pdf
- type: FAQ
url: https://www.naesb.org/pdf4/eir_user_interface_faq_0921.pdf
- type: Pricing
url: https://www.naesb.org/pdf4/naesb_eir_subscription_fee010715.docx
- type: Authentication
url: https://www.naesb.org/pdf4/ac_authorities_2023.pdf
- type: WSDL
url: wsdl/naesb-eir-webregistry.wsdl
- type: ChangeLog
url: https://www.naesb.org/weq/weq_eir.asp
- type: Roadmap
url: https://www.naesb.org/weq/weq_eir_requests.asp
- type: AgentSkill
name: Download a NAESB EIR registry publication
url: skills/naesb-download-eir-registry.md
common:
- type: X-MCPServerCandidate
url: mcp/naesb-mcp.yml
note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: DomainSecurity
url: security/naesb-domain-security.yml
- type: Website
url: https://www.naesb.org/
- type: About
url: https://www.naesb.org/aboutus.asp
- type: ContactUs
url: https://www.naesb.org/contactus.asp
- type: Documentation
url: https://www.naesb.org/ESPI_Standards.asp
- type: Tools
url: https://www.naesb.org/naesb_tools.asp
- type: Certification
url: https://www.naesb.org/materials/certification.asp
- type: CertifiedProducts
url: https://www.naesb.org/pdf2/cert_products.pdf
- type: CertificationAuthorities
url: https://www.naesb.org/pdf4/ac_authorities_2023.pdf
- type: Pricing
url: https://www.naesb.org/pdf/ordrform.pdf
- type: Licensing
url: https://www.naesb.org/copyright.asp
- type: TermsOfService
url: https://www.naesb.org/pdf4/terms&conditions.pdf
- type: PrivacyPolicy
url: https://www.naesb.org/privacy.asp
- type: Membership
url: https://www.naesb.org/membership.asp
- type: Newsletter
url: https://www.naesb.org/bulletin_newsletter.asp
- type: PressReleases
url: https://www.naesb.org/news.asp
- type: WhitePapers
url: https://www.naesb.org/white_papers.asp
- type: Support
url: https://www.naesb.org/contactus.asp
- type: Compliance
url: https://www.naesb.org/materials/certification.asp
- type: Authentication
url: authentication/naesb-authentication.yml
- type: Conventions
url: conventions/naesb-conventions.yml
- type: ErrorCatalog
url: errors/naesb-error-codes.yml
- type: Lifecycle
url: lifecycle/naesb-lifecycle.yml
- type: ChangeLog
url: changelog/naesb-changelog.yml
- type: Conformance
url: conformance/naesb-conformance.yml
- type: DataModel
url: data-model/naesb-data-model.yml
- type: LLMsTxt
url: llms/naesb-llms.txt
- type: AgentSkill
url: skills/_index.yml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we
store it to create your key and to recognise you if you sign in with another
provider. See our Privacy Policy and
Terms.
Kin Score
How this is scored →